Acute bronchiectasis includes all cases of acute right-sided heart failure due to a sudden increase in acute pulmonary vascular resistance. Pulmonary embolism is an occlusion of at least one pulmonary artery or pulmonary artery, usually due to ascending deep vein thrombosis. This is a fairly common disease, but difficult to diagnose because it is easily confused with other diseases. The following article clarifies the symptoms, diagnosis and management of acute bronchiolitis and pulmonary embolism.